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Nissan RB26DETT engine: known problems

Used in 3 guides · 2568cc petrol · 10 known problems

Displacement

2568cc

Layout

I6 twin-turbo

Fuel

petrol

Known problems10

Everything our guides list for the variants with this engine: the engine itself plus the gearbox and ancillaries it's paired with. Each shows which cars it's listed for.

High

Ceramic turbine wheel failure

The factory T28 turbos use ceramic exhaust wheels for fast spool, but they shatter under detonation or boost much above ~1.0 bar, sending debris and leaving a turbo (or two) dead. Many tuned cars have already grenaded the originals.

Fix: Replace with steel-wheel hi-flow or aftermarket turbos; never run boost on ceramics, and ensure tuning/fuel quality prevents knock.

Any (detonation/over-boost dependent) · ~$3000-7000 (pair of turbos)

Listed for: Nissan Skyline R32 · Nissan Skyline R33

High

Oil pump drive collar failure (pre-May 1993)

Early RB26 (and RB25/RB20) use a narrow oil-pump drive that only minimally engages the crank-snout flats. With the 8000rpm redline and a mis-shift over-rev, the drive can crack the pump gears, oil pressure collapses and the engine spins a bearing. Nissan didn't widen the crank snout until May 1993, so the AU-delivered 1991 cars are the vulnerable design.

Fix: Fit a billet crank collar and an upgraded (N1 or aftermarket) oil pump, and monitor oil pressure. Treat this as mandatory before any spirited driving.

Any - worse with high-rpm use · ~$8000-20000 (rebuild) / $1500-3000 (preventive collar + pump)

Listed for: Nissan Skyline R32

High

Oil pump drive collar failure (engine-destroying)

The RB26 oil pump is driven off a collar on the crank snout; the early narrow-engagement design can lose drive when the engine is over-revved, shock-loaded or run at sustained high rpm, dropping oil pressure and spinning bearings. R33 cranks are generally better than R32 (some have a wider collar) but it remains the defining RB26 failure - and many imports have been thrashed.

Fix: Fit an aftermarket crank collar and upgraded (N1-style) oil pump during any rebuild, run a quality oil-pressure gauge, and avoid over-revving. Confirm whether the collar mod has been done.

Any (worse over-revved) · ~$8000-20000+ (rebuild)

Listed for: Nissan Skyline R33

High

Tuner/abuse and authenticity risk

High-value, heavily-modified, sometimes crash-repaired or GTS-t-converted cars. A blown or tired RB26 is a five-figure problem, and fake GT-Rs exist.

Fix: Independent specialist inspection, compression/leakdown and boost-leak test, chassis/VIN verification, full import auction-sheet and PPSR check before buying.

Varies · Varies (huge)

Listed for: Nissan Skyline R33

High

Timing belt failure

Same belt service - failure = bent valves on legendary motor.

Fix: Belt + tensioner + water pump every 100k. Use OEM or Tomei parts only.

From 100k km interval · ~$2000-3500

Listed for: Nissan Skyline R34

High

Oil pump drive failure (catastrophic)

OEM oil pump drive collar known weak point - shears under hard use. Engine destruction follows.

Fix: MANDATORY billet oil pump drive on any modified RB26 (Tomei, Nitto). Many owners do this preventively.